$146 Find Cheap Flights from Ontario to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 11/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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Everything you should know

Cheapest round-trip
$210
Overall average: $360
WestJet
Thu 11/13Sun 11/23
YYZ - SEA • 1 stop
Cheapest non-stop
$243
Typical prices: $264-$501
Alaska Airlines
Fri 11/7Wed 11/12
YYZ - SEA • Non-stop
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Flight Deals
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Flight Deals

Cheap Flights from Ontario to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Seattle

Thu, Nov 13 - Sun, Nov 23
WestJet Logo
8:45 pm - 10:22 amYYZ-SEA
16h 37m1 stop
WestJet Logo
11:55 am - 12:26 amSEA-YYZ
9h 31m2 stops
$210WestJet
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Fri, Jan 16 - Wed, Jan 21
WestJet Logo
8:45 pm - 10:23 amYYZ-SEA
16h 38m1 stop
WestJet Logo
3:10 pm - 5:58 amSEA-YYZ
11h 48m2 stops
$213WestJet
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Wed, Jan 28 - Mon, Feb 2
Multiple Airlines Logo
6:20 am - 10:43 pmYOW-SEA
19h 23m1 stop
Multiple Airlines Logo
8:00 pm - 6:43 amSEA-YOW
7h 43m1 stop
$236Multiple Airlines
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Sat, Nov 8 - Fri, Nov 14
Multiple Airlines Logo
4:45 pm - 7:05 pmYYZ-SEA
5h 20mnonstop
Multiple Airlines Logo
11:55 am - 11:39 pmSEA-YYZ
8h 44m2 stops
$238Multiple Airlines
Find Deal
Tue, Apr 14 - Wed, Apr 15
Air Canada Logo
5:50 pm - 10:08 pmYOW-SEA
7h 18m1 stop
Air Canada Logo
8:00 pm - 6:43 amSEA-YOW
7h 43m1 stop
$242Air Canada
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Tue, Apr 14 - Wed, Apr 15
United Airlines Logo
10:35 am - 6:59 pmYOW-SEA
11h 24m1 stop
United Airlines Logo
5:00 pm - 1:45 pmSEA-YOW
17h 45m2 stops
$247United Airlines
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Tue, Apr 14 - Wed, Apr 15
United Airlines Logo
10:35 am - 4:24 pmYOW-SEA
8h 49m1 stop
United Airlines Logo
5:00 pm - 1:45 pmSEA-YOW
17h 45m2 stops
$248United Airlines
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Sat, Nov 8 - Sat, Nov 15
Air Canada Logo
7:50 pm - 10:16 pmYYZ-SEA
5h 26mnonstop
Air Canada Logo
10:05 am - 8:54 pmSEA-YYZ
7h 49m1 stop
$251Air Canada
Find Deal
Wed, Nov 12 - Tue, Nov 18
Alaska Airlines Logo
4:45 pm - 7:05 pmYYZ-SEA
5h 20mnonstop
Alaska Airlines Logo
7:55 am - 3:35 pmSEA-YYZ
4h 40mnonstop
$257Alaska Airlines
Find Deal
Sat, Nov 8 - Sat, Nov 15
Alaska Airlines Logo
4:45 pm - 7:05 pmYYZ-SEA
5h 20mnonstop
Alaska Airlines Logo
7:55 am - 3:35 pmSEA-YYZ
4h 40mnonstop
$261Alaska Airlines
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Good to know

Low seasonJanuary
Cheapest flight$146
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly and prices are also 0% lower on average.
Flight from Ottawa to Seattle

FAQs for booking flights from Ontario to Seattle

  • How does KAYAK find such low prices on flights from Ontario to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Lynnwood
Centralia
Fife
Westport
Mukilteo
Lakewood
Lacey
Woodinville
Aberdeen
Poulsbo
Edmonds
Shoreline
DuPont
Monroe
Castle Rock
Edgewood

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Seattle (SEA)

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